import sys
try:
    f = open ('ficha.txt')
    s = f.readline ()
    i= int (s.strip())
except IOError as e:
    print "I/O error ({0}): {1}".format (e.errno, e.strerror)
except ValueError:
    print " Could not convert data to an integer."
except:
    print "Unexpected error:", sys.exc_info()[0]
    raise
